28638407019 has 8 divisors (see below), whose sum is σ = 38246232640. Its totient is φ = 19061426376.

The previous prime is 28638407003. The next prime is 28638407029. The reversal of 28638407019 is 91070483682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28638407019 - 2⁴ = 28638407003 is a prime.

It is a super-2 number, since 2×28638407019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28638407029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709077 + ... + 7712790.

It is an arithmetic number, because the mean of its divisors is an integer number (4780779080).

Almost surely, 2^28638407019 is an apocalyptic number.

28638407019 is a deficient number, since it is larger than the sum of its proper divisors (9607825621).

28638407019 is a wasteful number, since it uses less digits than its factorization.

28638407019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15422489.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 28638407019 in words is "twenty-eight billion, six hundred thirty-eight million, four hundred seven thousand, nineteen".